Hubbell Burndy India Mechanical Engg. Design Interview Questions and Answers

Prandtl number is a dimensionless number used in fluid mechanics to describe the ratio of momentum diffusivity to thermal diffusivity.

• It is named after the German physicist Ludwig Prandtl.

• It is used to predict fluid flow behavior and heat transfer in different materials.

• It is calculated as the ratio of kinematic viscosity to thermal diffusivity.

• It is important in the study of boundary layers, turbulence, and convection...read more

Manholes are circular because they cannot fall through their own opening.

• Circular manholes cannot fall through their own opening, unlike square or rectangular ones.

• Circular shape distributes weight evenly, making it easier to move and handle.

• Circular shape also reduces the risk of injury from sharp corners.

• Circular manholes are easier to manufacture and install.

• Circular shape allows for easier access from any angle.

• Cir...read more

Bernoulli's equation relates the pressure, velocity, and height of a fluid in motion.

• Bernoulli's equation is based on the principle of conservation of energy.

• It is commonly used in fluid mechanics to analyze the flow of fluids through pipes and channels.

• The equation states that as the velocity of a fluid increases, its pressure decreases, and vice versa.

• It can be expressed as P + 1/2ρv^2 + ρgh = constant, where P is pr...read more

Answering questions related to self introduction, family background, least count of Vernier caliper, screw gauge, first angle and third angle projection.

• Self introduction: Briefly introduce yourself, highlighting your education and experience in the field of mechanical engineering.

• Family background: Share a few details about your family, such as their occupation or any influence they had on your career choice.

• Least cou...read more

Stress strain curve shows the relationship between stress and strain in a material. Steel is stronger but less ductile than aluminum.

• Stress strain curve is a graphical representation of the behavior of a material under stress

• Steel has a higher yield strength and ultimate strength than aluminum

• Aluminum is more ductile and has a higher strain hardening capacity than steel

• Steel is more brittle than aluminum and is prone t...read more

Different sheet metal manufacturing processes and their suitability based on volume, lead time, and cost.

• Laser cutting for high volume and precision

• Punching for medium volume and cost-effective production

• Waterjet cutting for low volume and complex shapes

• Bending for forming and shaping

• Stamping for high volume and repetitive shapes

• Roll forming for continuous production of long parts

• Choosing the right process based on the...read more

A free body diagram is a visual representation of the forces acting on a body.

• It shows all the external forces acting on a body

• It helps in analyzing the forces and their effects on the body

• It is used in engineering to design and analyze structures and machines

• It is important to label all the forces and their directions in the diagram